Optical lens and semiconductor laser device

Abstract

The optical lens 1 in accordance with the present invention comprises an optically effective part 5, formed as a curved surface in at least one of light-entrance and light-exit faces, for acting in an X-axis direction on light emitted from a light-emitting device; and a pair of protrusions 10, integrally formed in the face on the side provided with the optically effective part 5, projecting in an optical axis direction on both sides of a light-transmitting area; the pair of protrusions 10 projecting beyond a surface of the optically effective part. Such an optical lens 1 can prevent the optically effective part 5 from coming into direct contact with an arrangement surface where the optical lens 1 is placed, side faces of members adjacent to the optical lens1, and the like in each manufacturing step, during delivery, and so forth, whereby the optically effective part 5 is hard to incur damages and the like.

Description

TECHNICAL FIELD[0001]The present invention relates to an optical lens acting on light emitted from a light-emitting device.BACKGROUND ART[0002]In a conventional type optical lens, there has been a case where an optically effective part, which is a part collimating or converging incident light, comes into contact with an arrangement surface where the optical lens is placed, side faces of members adjacent to the lens, and the like in each manufacturing step or during delivery.DISCLOSURE OF THE INVENTION[0003]Such a conventional type optical lens has been problematic in that the optically effective part may be damaged upon coming into contact with the arrangement surface where the optical lens is placed or other members, thus deteriorating performances of outgoing light.[0004]In order to overcome the problem mentioned above, it is an object of the present invention to provide an optical lens whose optically effective part is hard to damage, thus being excellent in performances of outgo...

AI Technical Summary

Benefits of technology

The present invention provides an optical lens that can prevent damage to its optically effective part when placed on an arrangement surface or in contact with other members. This is achieved by integrating protrusions into the lens, which prevent direct contact between the lens and the arrangement surface. The optical lens acts on light components emitted from a light-emitting device and emits the light in a specific direction. The curved surfaces on the lens act on the light components and the protrusions prevent damage to the optically effective part during manufacturing, delivery, or use. The optical lens can be used in a semiconductor laser apparatus and is hard to damage.

Problems solved by technology

Such a conventional type optical lens has been problematic in that the optically effective part may be damaged upon coming into contact with the arrangement surface where the optical lens is placed or other members, thus deteriorating performances of outgoing light.

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